Re: 'Vortrack' on Irish charts?
TolTol,
Easy peasy. I use a chinagraph pencil. Simply draw a straight line. It might not be totally straight but it doesn't have to be, you're flying VFR. Then you simply line your pencil up on line you have drawn for the diversion, then transpose it to the nearest VOR rose to get the track. My thumb edge is ust about 10nm. I just count how many thumbs to get the distance. Then do your quick clock face technique drift/GS calcs and workout your ETA.